The Insects of Australia: A Textbook for Students and Research Workers, Volume 1

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Page 124A diagnosis is the formal statement of the character states which distinguish one taxon from others, in contrast to a description which is a full account of the
recorded character states of that taxon. In the construction of a key, character
states ...

Page 125In 'easy' cases where genuine synapomorphies abound and homoplasies are
few or absent, interrelationships between extant orders can be identified with a
degree of certainty unattainable for fossil taxa. However, increasing the amount
of ...

Page 196Grande (1985), though accepting many of the reservations concerning the
primacy of palaeontology, argued that fossils could (i) provide new morphological
and ontogenetic data for systematics, (ii) provide additional taxa to add to the
known ...